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*Estimated payments are calculated by Cars.com and are for informational purposes only. We’ve estimated your taxes based on your provided ZIP code. These estimates do not include title, registration fees, lien fees, or any other fees that may be imposed by a governmental agency in connection with the sale and financing of the vehicle. Other taxes may apply. They do not represent a financing offer or a guarantee of credit from the seller. Actual terms vary by lender.
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Used
2018 GMC Sierra 1500 trucks
for sale
near
Robstown, TX
- Down Payment
- $0
- Net trade-in value
- $0
- Months
- 72
- APR
- 7.0%
- Sales tax
- 0.0%
*Estimated payments are calculated by Cars.com and are for informational purposes only. We’ve estimated your taxes based on your provided ZIP code. These estimates do not include title, registration fees, lien fees, or any other fees that may be imposed by a governmental agency in connection with the sale and financing of the vehicle. Other taxes may apply. They do not represent a financing offer or a guarantee of credit from the seller. Actual terms vary by lender.
**Your Saved Vehicles list will be shared along with your contact information when you submit a vehicle request to a dealership. To opt out of this sharing, please view your options on Cars.com Privacy Notice.
Used
2018 GMC Sierra 1500 SLE
Vehicle information
Features
Reviews
Great experience.
Great experience. Jimmy was great and answered all my questions. love my new Yukon XL 2025. I would definitely recommend Jimmy and this dealership to my friends and family.
2018 crew cab gmc Sierra 1500
Am in disbelief every week at the Gas Pumps. Thou a big truck, mileage per gallons are 18 +. Last week it was 22.8. This week 19.78.
Used
2018 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Customer Service was outstanding.
Customer Service was outstanding. Jeff Knolls is a one of a kind. He is trustworthy and customer oriented and truly cares about the customer. He can be a trainer.
new owner of the gmc denali, 2018 6.2
handles and drives great, the electronics don't always work, mirrors don't always work, spray with wd 40, check engine light, EVAP culprit, auto nation has no luck with this, will drive it till the warrenty expires and its back to ford for me
Used
2018 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
Easy experience.
Easy experience. Truck was clean, salesperson was very knowledgeable and friendly. There was very little pressure. The process of signing papers was efficient. I would buy here again.
best in class
My GMC Sierra is the best ride I have had in all the years that I have been driving. I started driving in 1977. I love my new Sierra.
Used
2018 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Landers CDJR made the buying process quick and easy as
Landers CDJR made the buying process quick and easy as possible. They were fair on the price and trade-in. Thanks for your help and professionalism.
Better than my old truck
The truck has more features than I need. It is quiet and comfortable. it has plenty of power to pull a work trailer. Overall a nice truck
Used
2018 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Great deal from Coulter
Coulter dealerships have been very good to me with the vehicles I have bought from them in the past. Coulter Cadillac was the best experience yet. I got a great deal and I know it! The deal was mostly done on line and did not change the day the xt6 was picked up. This is not the usual dealership experience. No wonder Coulter has been around for 100 years. Thank you very much, Steve and Nancy
This is an attractive and enjoyable vehicle.
I traded my Chevrolet Silverado for this GM Certified GMC Sierra 1500. It is an attractive and enjoyable vehicle. Some years ago I had a GMC and really prefer them over a Chevrolet. This vehicle is just what I need for hauling and general driving.
Used
2018 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Salesman was informative, kind, and patient wit all our
Salesman was informative, kind, and patient wit all our questions. Not pushy either. We appreciated how friendly the whole staff was as well.
Used
2018 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
This dealership has an impressive slate of exotic cars, I
This dealership has an impressive slate of exotic cars, I was just looking for a lesser jag. They treated me very well not pushy and very helpful. There were no hassles in getting to test drive the car I was looking at. When I decided to walk away there was no pushback or pressure to “ run the numbers”. Both the sales person and the manager communicate with me to ensure my experience was a positive one.
Used
2018 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
Wow!
Wow! I am so impressed with my experience here! From start to finish everything was so smooth. Our salesman Brian was absolutely phenomenal. Hands down easiest car purchase yet!
Used
2018 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Dealing with Patriot Chrysler was a great experience.
Dealing with Patriot Chrysler was a great experience. I drove 876 miles from northern Ohio to make the deal. Driving 13 hours hoping that the vehicle is how it was presented. After making a nice offer on my trade, we made the deal. I was heading back to Ohio with a smile my face. Great experience. Thank you!
Used
2018 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
So it all started when my daughter was driving my car to
So it all started when my daughter was driving my car to the airport to leave it for me to pick up the next day ? however, right before taking it to the airport to park it the brakes froze up and started smelling really really bad. Luckily her husband was following behind her, and they inched it to your dealership. She explained what she needed to have happen as they were getting ready to go on a weekend cruise to the Bahamas out of Cape Canaveral. So they left my car with you guys, and off they went on their cruise. Meanwhile, I am in San Diego wondering what?s going on with my car. Omar graciously explained the process to her that he would have it assessed to find out what was actually wrong with it and then get back with me in San Diego, which he did. Then he ordered the parts for my car and they were not to be in until Tuesday. So I changed my flight from Saturday until the following Wednesday and my car was incapable hands the entire time. Omar was very professional in keeping me informed of what was going on. Your service department helped me get the payment through and even made arrangements to have my car keys upfront at the sales department because my flight would not be in until after closing of your service department hours. It all went flawlessly because of you guys and I appreciate it very very much.
Used
2018 GMC Sierra 1500 Base
Vehicle information
Features
Reviews
Overall great dealership.
Overall great dealership. Love Staff in Service dept and my personal sales rep, Richard ? looking forward to my new 2026 Equinox!!!! Yes Yes okay okay
Used
2018 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
If they are going to continue to sell used Teslas, Corwin
If they are going to continue to sell used Teslas, Corwin Toyota needs to better train its employees how to transfer these vehicles through the Tesla process. The previous owner on my purchase was still listed as the owner (an elderly woman). Her credit card was apparently still being used to pay for vehicle electric charging expenses on my vehicle because I couldn't put my credit card on account until prior owner was removed from Tesla account. Simple process, but Corwin needs to commit to address this Tesla qwirk to avoid unfair charges to previous owners. I hope they will reimburse that poor prior owner. Other than this problem, the sales staff were great.
Used
2018 GMC Sierra 1500 Denali
Vehicle information
Features
Certified
2018 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
We drove 5 hrs to purchase our vehicle and it was well
We drove 5 hrs to purchase our vehicle and it was well worth the drive. We bought a used car and we were treated like we won the lottery and we’re buying a dozen new ones!! Brad Arrington was the best! Everyone we dealt with was top notch. Who knows, someday we may drive 5 hrs just to come back. The Browns Gainesville Texas
Used
2018 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
Tony provided excellent customer service.
Tony provided excellent customer service. His actively listening to my wants along with his extensive knowledge of the vehicle help him pick out perfect vehicle for me.
Used
2018 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Friendly, very straightforward and easy to work with.
Friendly, very straightforward and easy to work with. Worth the drive and a very nice facility. Met all my expectations. Would highly recommend to everyone.
Used
2018 GMC Sierra 1500 Base
Vehicle information
Features
Reviews
Amazing service, very considerate staff, helped us get
Amazing service, very considerate staff, helped us get done in a timely manner, understood our situation and did their absolute best. 😊
Used
2018 GMC Sierra 1500 SLE
Vehicle information
Features
Reviews
They were very helpful.
They were very helpful. I didn?t have to drive more than once, they were kind enough to mail papers. I felt valued as a customer.
Used
2018 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
I have always wanted a Rubicon but felt I could never
I have always wanted a Rubicon but felt I could never afford it. Ive always counted on and trust Ayden. He is amazing. He was able to help me realize that i could have one and he helped me make my dream com true. i have purchase 4 previous vehicles from Auto Nation and from Ayden. He's always been there for me in every case. I so appreciate him. He's honest and so very helpful. I can't thank him enough for answerinng questions and making my dream come true. Thankls Ayden , Love you man.
Used
2018 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Pleasure to deal with
Quick response, I emailed them about the vehicle I was interested in,they responded within 24 hrs. I asked questions and they answered them quickly and honestly. Their description of the vehicle is spot on accurate.
GMC Sierra 1500 prices by year
| Model year | Average price | Deals |
|---|---|---|
| 2026 GMC Sierra 1500 | $63,895 | |
| 2025 GMC Sierra 1500 | $64,481 | 1 Good deal |
| 2022 GMC Sierra 1500 | $43,622 | 6 Good deals |
| 2021 GMC Sierra 1500 | $34,136 | 8 Good deals |
About the 2018 GMC Sierra 1500
Base shown (base trim).
- Seating
- 3
- Door count
- 2
- Drivetrain
- Rear-wheel drive
- Combined MPG
- 20
- Transmission
- 6-Speed A/T
- Engine
- 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability)
How much does the 2018 GMC Sierra 1500 cost?
The 2018 GMC Sierra 1500 price depends on several factors, including the trim level, optional features, mileage, vehicle history and location. The nationwide average price for a 2018 Sierra 1500 is $28,240, with pricing starting at $11,595.
What is the MPG of the 2018 GMC Sierra 1500?
The 2018 GMC Sierra 1500 offers up to 18 MPG in city driving and 24 MPG on the highway for a combined rating of 20 MPG.
These figures are based on EPA mileage ratings and are for comparison purposes only. The actual mileage will vary depending on the selected vehicle trim, driving conditions, driving habits, vehicle maintenance, and other factors.
What are some similar vehicles and competitors of the 2018 GMC Sierra 1500?
The 2018 GMC Sierra 1500 compares to and/or competes against the following vehicles:
Is the 2018 GMC Sierra 1500 reliable?
The 2018 GMC Sierra 1500 has an average reliability rating of 4.7 out of 5 according to Cars.com consumers. Find real-world reliability insights within consumer reviews from 2018 Sierra 1500 owners.
Is the 2018 GMC Sierra 1500 a good truck?
Below are the Cars.com consumer ratings for the 2018 GMC Sierra 1500.
- Comfort 4.9
- Interior 4.8
- Performance 4.7
- Value 4.6
- Exterior 4.8
- Reliability 4.7
93% of drivers recommend this car
- Comfort 4.9
- Interior 4.8
- Performance 4.7
- Value 4.6
- Exterior 4.8
- Reliability 4.7
Base (10 styles)
| Style | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 2WD Crew Cab 143.5" | 4WD Crew Cab 143.5" | 4WD Double Cab 143.5" | 2WD Double Cab 143.5" | 4WD Crew Cab 153.0" | 2WD Crew Cab 153.0" | 4WD Reg Cab 119.0" | 2WD Reg Cab 119.0" | 2WD Reg Cab 133.0" | 4WD Reg Cab 133.0" |
| Inventory price | |||||||||
| Starting at $35,500 | Starting at $38,700 | Starting at $37,000 | Starting at $33,000 | Starting at $40,100 | Starting at $36,900 | Starting at $32,900 | Starting at $29,000 | Starting at $29,300 | Starting at $33,200 |
| Combined MPG | |||||||||
| 20 | 19 | 19 | 20 | 18 | 19 | 19 | 20 | 20 | 19 |
| Engine | |||||||||
| 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) | 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) | 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) | 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) | 355.0-hp, 5.3-liter, 8 Cylinder Engine (Gasoline Fuel) | 355.0-hp, 5.3-liter, 8 Cylinder Engine (Gasoline Fuel) | 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) | 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) | 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) | 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) |
Denali (3 styles)
| Style | ||
|---|---|---|
| 4WD Crew Cab 153.0" Denali | 2WD Crew Cab 143.5" Denali | 4WD Crew Cab 143.5" Denali |
| Inventory price | ||
| Starting at $56,300 | Starting at $52,900 | Starting at $56,000 |
| Combined MPG | ||
| 17 | 18 | 17 |
| Engine | ||
| 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) | 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) | 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) |
SLE (10 styles)
| Style | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 2WD Reg Cab 119.0" SLE | 4WD Reg Cab 133.0" SLE | 4WD Reg Cab 119.0" SLE | 2WD Reg Cab 133.0" SLE | 4WD Double Cab 143.5" SLE | 2WD Double Cab 143.5" SLE | 4WD Crew Cab 153.0" SLE | 2WD Crew Cab 153.0" SLE | 2WD Crew Cab 143.5" SLE | 4WD Crew Cab 143.5" SLE |
| Inventory price | |||||||||
| Starting at $35,700 | Starting at $39,900 | Starting at $39,600 | Starting at $35,800 | Starting at $42,100 | Starting at $38,300 | Starting at $46,100 | Starting at $42,100 | Starting at $40,700 | Starting at $44,700 |
| Combined MPG | |||||||||
| 20 | 19 | 19 | 20 | 19 | 20 | 18 | 19 | 20 | 19 |
| Engine | |||||||||
| 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) | 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) | 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) | 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) | 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) | 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) | 355.0-hp, 5.3-liter, 8 Cylinder Engine (Gasoline Fuel) | 355.0-hp, 5.3-liter, 8 Cylinder Engine (Gasoline Fuel) | 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) | 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) |
SLT (5 styles)
| Style | ||||
|---|---|---|---|---|
| 2WD Double Cab 143.5" SLT | 4WD Crew Cab 143.5" SLT | 2WD Crew Cab 143.5" SLT | 4WD Double Cab 143.5" SLT | 4WD Crew Cab 153.0" SLT |
| Inventory price | ||||
| Starting at $42,800 | Starting at $48,400 | Starting at $45,200 | Starting at $46,000 | Starting at $48,700 |
| Combined MPG | ||||
| 19 | 17 | 18 | 18 | 17 |
| Engine | ||||
| 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) | 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) | 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) | 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) | 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) |
*Estimated payments are calculated by Cars.com and are for informational purposes only. We’ve estimated your taxes based on your provided ZIP code. These estimates do not include title, registration fees, lien fees, or any other fees that may be imposed by a governmental agency in connection with the sale and financing of the vehicle. Other taxes may apply. They do not represent a financing offer or a guarantee of credit from the seller. Actual terms vary by lender.
**Your Saved Vehicles list will be shared along with your contact information when you submit a vehicle request to a dealership. To opt out of this sharing, please view your options on Cars.com Privacy Notice.
Research the 2018 GMC Sierra 1500
Compare the 2018 GMC Sierra 1500
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This vehicle is certified pre-owned, backed by a manufacturer warranty, and typically undergoes a rigorous multi-point inspection to ensure quality and reliability.
This vehicle is currently in high demand given its competitive price, desirable features, and overall condition, and may have a higher chance of selling quickly.
